Reversing contactor assembly for bidirectional motor control
The Siemens 3RA2327-8XE30-2BB4 is a SIRIUS reversing contactor assembly — two mechanically interlocked contactors in a single S0-size package that handles forward/reverse motor control without external interlocks. The 24 VDC coil with spring-type terminals matches standard PLC-level control voltages — no separate interface relay needed when the controller outputs 24 VDC.
Spring-loaded main and coil terminals — no screwdriver torque spec needed
Clearance around the assembly: 6 mm upward, forward, downward, and to the side — zero clearance needed backward, which simplifies panel layout against the back wall.
Active production — sourced per BOM quantity
Each assembly ships with two supplied contactors: 3RT2027-2BB40-0CC0 and 3RT2027-2BB40, plus the RS assembly kit 3RA2923-2AA2 — the reversing interlock is factory-integrated, not a field-add-on. Rated for operation from -25 °C to +60 °C ambient, storage from -55 °C to +80 °C — suitable for unheated industrial halls and outdoor cabinets with climate control. Mechanical life is 10,000,000 operations typical — the reversing pair shares the same mechanical endurance as the base contactors.